Carlo Ponti, n.d., Milan, The Dome, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129230

Carlo Ponti, n.d., Rome, Interior of St. Paul’s Church, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129239

Carlo Ponti, n.d., Naples, Panorama of Vomero and the Eruption of Mount Vesuvius, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129232

Carlo Ponti, n.d., Spain, The Alhambra; The Lion’s Court, Seville, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129242

Carlo Ponti, n.d., Milan, The Dome, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129231

Unidentified photographer, n.d., Two men leaning into wall under sign that reads "Defense d'uriner", Carte de visite, California Museum of Photography, LL/115927

Carlo Ponti, n.d., Rome, Ponte Castello S. Angelo, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129241

Adam Clark Vroman, 1901, Hopi Maiden, Arizona Hopi Indian Reservation, Gelatin silver print, California Museum of Photography, LL/119617

Maxwell (Spokane Falls, Wash.), n.d., Backmark for "Maxwell Photographers, Traders Block, Cor. Horward St. and Riverside Ave., Spokane Falls, Wash." with the message "Take the Elevator, Howard St. Entrance.", Cabinet card, back, California Museum of Photography, LL/85536

Carlo Ponti, n.d., Spain, The Alhambra; The Lion’s Court, Seville, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129243

Benjamin West Kilburn, 1901 (copyright), 14036. Japanese Belles gazing at our Celebrated Views through the No. 8? Patented "Saturn," Tokio, Japan, Stereoview, detail, California Museum of Photography, LL/126825

Unidentified photographer, n.d., Cedars of Lebanon - once mighty groves that supplied wood for Solomon's Temple Mt. Lebanon. Syria. Asia., Stereoview, California Museum of Photography, LL/100791

Carlo Ponti, n.d., Rome, Arch of Constantine, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129237

Carlo Ponti, n.d., Venice, Arcades of Palace Martinengo, Fondaco dei Tuchi (Grand Canal), Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129245

Bradley & Rulofson, n.d., Backmark for "Bradley & Rulofson, 429 Montgomery St., San Francisco" with "The only Elevator connected with Photography in the World", Carte de visite, back, California Museum of Photography, LL/85733

Ansel Adams, 1981, 14 August, Letter from Ansel Adams to Priscilla Gray, Registrar, California Museum of Photography, Letter, California Museum of Photography, LL/129441

Charles T. Collier, n.d., Wet stamp for "C.T. Collier, Photographic Artist - Views of Riverside and Southern California - Riverside, California.", Wet stamp, California Museum of Photography, LL/107578

Carlo Ponti, n.d., Pisa, Exterior of Baptistry with front of Cathedral and Leaning Tower, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129234

T. Takagi (Kobe), n.d., The Catalogue of Lantern Slides Etc., Etc., Catalogue cover, California Museum of Photography, LL/100763

Benjamin West Kilburn, 1901 (copyright), 14036. Japanese Belles gazing at our Celebrated Views through the No. 8? Patented "Saturn," Tokio, Japan, Stereoview, California Museum of Photography, LL/126824

Carlo Ponti, n.d., Megalethoscope, Digital image, California Museum of Photography, LL/129229

Carlo Ponti, n.d., Venice, The Bridge of Sighs, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129246

Carlo Ponti, n.d., Rome, Ponte Castello S. Angelo, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129240

Carlo Ponti, n.d., Rome, Arch of Constantine, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129236

Carlo Ponti, n.d., Pisa, Exterior of Baptistry with front of Cathedral and Leaning Tower, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129235

Benjamin West Kilburn, 1901 (copyright), 14036. Japanese Belles gazing at our Celebrated Views through the No. 8? Patented "Saturn," Tokio, Japan, Stereoview, detail, California Museum of Photography, LL/126826

Harry's Gallery (Steubenville, Ohio), n.d., Backmark for "Harry's Gallery, 405 & 407 Market St., Over Stark & Forney's Jewelry Store, Steubenville, Ohio), Carte de visite, back, California Museum of Photography, LL/85734

Carlo Ponti, n.d., Naples, Panorama of Vomero and the Eruption of Mount Vesuvius, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129233

Carlo Ponti, n.d., Rome, Interior of St. Paul’s Church, Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129238

Carlo Ponti, n.d., Venice, Arcades of Palace Martinengo, Fondaco dei Tuchi (Grand Canal), Albumen print, Megalethoscope slide, Day, California Museum of Photography, LL/129244

Carlo Ponti, n.d., Venice, The Bridge of Sighs, Albumen print, Megalethoscope slide, Night, California Museum of Photography, LL/129247

Underwood & Underwood, n.d., The Oldest of the Sacred Cedars of Lebanon - Monarch of the 400, Stereoview, California Museum of Photography, LL/100794

Chauncey L. Moore, n.d., Backmark for "Chauncey L. Moore, Photographic Artist, Republican Building, 419 Main Street, Springfield, Mass.", Cabinet card, back, California Museum of Photography, LL/112644

Gentile (Chicago), n.d., Backmark for "Gentile, Portrait and Landscape Photographer, S.E. Corner State and Washington St. opposite Field, Leiter & Co., Chicago" with "The only Gallery using a Water Power Elevator in the World", Carte de visite, back, California Museum of Photography, LL/85535